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2. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   An 80 US gal (300 L; 67 imp gal) electric storage tank water heater was able to have a minimum energy factor of 86% under the pre-2015 standard, while under the 2015 standard, the minimum energy factor for an 80-gallon electric storage tank water heater is now 197%, which is only possible with heat pump technology. This rating measures ...

3. Storage water heater - Wikipedia

   en.wikipedia.org/wiki/Storage_water_heater

   Solar heat is clean and renewable. This is the most modern system. Increasingly, solar powered water heaters are being used. Their solar thermal collectors are installed outside dwellings, typically on the roof or walls or nearby, and the potable hot water storage tank is typically a pre-existing or new conventional water heater, or a water heater specifically designed for solar thermal.

4. Hot water storage tank - Wikipedia

   en.wikipedia.org/wiki/Hot_water_storage_tank

   A hot water storage tank (also called a hot water tank, thermal storage tank, hot water thermal storage unit, heat storage tank, hot water cylinder, and geyser) is a water tank used for storing hot water for space heating or domestic use. Water is a convenient heat storage medium because it has a high specific heat capacity. This means ...

5. Off-Road RVs Exist, and They're Really Freaking Cool

   www.aol.com/off-road-rvs-exist-theyre-230000388.html

   It can go 2,100 miles on a single 211-gallon tank of fuel. ... a refrigerator that can be accessed from inside or out, a 4-gallon water heater, and gas-fired furnace. ... 12-volt electric tank ...

6. Energy factor - Wikipedia

   en.wikipedia.org/wiki/Energy_factor

   The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...

7. What Is Total Daily Energy Expenditure & How Do I Calculate It?

   www.aol.com/total-daily-energy-expenditure...

   Body composition is the ratio of muscle, body fat, bone, and water in your body. It offers a more holistic view of your health than just body weight alone, taking into account factors like muscle ...